Someone said:
. . . what constitutes a single piece isn't exactly well defined - it appears nowhere in the rules, and depends on semantics.
I'm only half inclined to agree that this is a matter semantics. More accurately I suspect that this is a matter of language, and while the rules are not always well defined, the English language generally is.
dictionary.com said:
Dictionary.com Unabridged (v 1.1)
piece [pees] Pronunciation Key noun, verb, pieced, piec·ing.
–noun
1. a separate or limited portion or quantity of something: a piece of land; a piece of chocolate.
<snip>
10. one of the parts that, when assembled, form a whole: the pieces of a clock.
11. an individual article of a set or collection: a set of dishes containing 100 pieces.
Where 'piece' is not a term of art in D&D, I think it appropriate to fall back on the literal definition of the word when deciding what a 'piece' is in game. That definition is fairly clear.
Someone said:
It affects a lot other spells, like Shatter or Heat metal. For example, can I Shatter a chain, or only a single link in it? a chain is after all, a collection of links (and they are not even glued to each one) yet it's treated as a single item.
The fact that a chain can be considered a single 'item' is both factual and irrelevant. Items can be made of pieces, and the two terms are not universally interchangeable. The key term used in the description of that spell however is 'a single solid object'. Perhaps you and I would disagree on this too, but I take 'solid' in this case to mean 'rigid', which a length of chain is not. A coil of rope is 'solid' too, in so far that it is not 'fluid' or 'gaseous', but I would balk at someone 'shattering' it. That single link of chain however . . .
Someone said:
Also, heat metal heats "metal equipment" in a creature's possesion, but says that items make saving throws. Surely it doesn't mean that helmets, chesplates, codpieces, individual chaimail links, greaves, shoulder guards, etc, make their own saving throws, despite being also individual items conveniently grouped as "one armor".
I have to agree with this conclusion, and for several reasons. Firstly, as stated above, the fact that items can be made of pieces means that your cod piece
can share the same saving throw with your gorget. Furthermore 'item' is a term of art in D&D. One can find an entire suit of armor as a single magical
item, with no pieces excluded. Also, the fact that the spell lists the target as
SRD said:
Metal equipment of one creature per two levels, no two of which can be more than 30 ft. apart; or 25 lb. of metal/level, all of which must be within a 30-ft. circle
supports this. Items and equipment are both terms of art in D&D and are frequently interchangeable. For this spell, it is obviously more appropriate for each 'item' to gain a saving throw.
Rackhir said:
But the whole argument is about interpretation of sematics, not really the rules. Nobody is arguing over if the sentence reads "One contiguious stone with no breaks or fractures or mortaring." or "One stone object of any size, composition or conglomeration." It's the old problem of insufficient precision in language. Frank and I disagree about what consitutes "an existing piece of stone".
If we look deep enough we'll probably find poorly phrased exceptions, but it seems to me that the spells generally do just what their descriptions say they do. Even with the examples of 'problem' spells given above, we see this to be the case. The words in those spell descriptions have specific meanings, whether defined in game or in the dictionary, and when those meanings are understood the outcome is fairly predictable. I think that the problem of 'semantics' comes in when we
want the spell to do something other than what it
says it does. In that case some of us tend to stretch or skew the meaning of words to our liking. If everyone around the table can agree that "this is what the spell ought to do" then fine. But if such a consensus cannot be reached than the literal meaning of the description (or DM decree) should be respected.
- Vicious Penguin